Add sdk_version: "current" to libtextclassifier_hash_headers am: 1a1a7ac3ee am: 6702d662a3 am: e43c70d178

Original change: https://android-review.googlesource.com/c/platform/external/libtextclassifier/+/1970659

Change-Id: I03aa7c97754df0acdeecf101082f861828ac4314